MITRINOVITCH, D. S. SUR L’EQUATION DIFFERENTIELLE D’UN PROBLEME DE KUHELJ. Matematichki Bilten, [S. l.], v. 1, n. 1, 1951. Disponível em: https://bilten.smm.org.mk/index.php/bilten/article/view/1141. Acesso em: 13 jun. 2026.